Transmission-tower.



PATENTED JAN. 14, 1908.

D. R. SCHOLES. I TRANSMISSION TOWER. APPLICATION FILED MAY 21, 1907.

3 SHBETS-SH EET 1.

PATENTFD JAN. 14, 1908.

D. E SOHOLES. TRANSMISSION TOWER APPLICATION FILED MAY 21, 1907,

v s SHEETS-SHEET 2.

No. 876,596. PATENTED JAN. 14, 1908. D. R. SGHOLES. TRANSMISSION TOWER.

APPLICATION FILED MAY 21, 1907.

3 SHEETS-SHEET 3.

- gouge constructed of three corner osts, A,

d and (1 preferably made of angle iron of OF CHICAGO, ILLINOIS, ASSIG'NOTR TC AIIRMOTCR COMPANY, OF

CHICAGO, ILLINOiS,

DANIEL R. SCHO LES,

t m OFFICE.

A CORPORATION.

TRANSMISSION-TOWER.

not erases.

Specification of Letters Patent,

Patented Jan. 14, 19 08.

-Applioatio11 filed May 21, 1907. Serial No. 374E964.

To all whom it may concern:

Be it known that I, DANIEL R. SOHOLES, citizen of the United States, residing-at Chicago, ii the county of Cook and State of "lin We invented certain new and usei., ling ova-meritsinTransrnissio11-Towcrs, of which the following is a specification.

The present invention relates to a trans-- mission tover for carrying electric transmission wires and its object is to provide an improved tower which is particularly adapted for this purpose, especially Where suspension insulators are used, but which is also adapted for the generalpurposes of towers.

The invention consists in the features of novelty that are hereinafter described, refonce being had to the accom anying drawin s, which are made a part iereof and in ich: Figure 1 is an elevation of the upper part oia triangular tower embodying the invention. Fig. 2 is a horizontal section thereof on the line 2'2, Fig. 1, on a larger scale. Figs. 3 and 4 are, respectively, a side elevation and an end elevation, on a still larger scale, of the outer end of one of the cross arms and a ortion of a suspension insulator carried tliereby. Fig. 5 is an elevation oi the upper part of a quadrangular tower embodying the invention. Fig. 6 is a horizontal section thereof on the line 66, Fig. 5, none of the parts below the lower crossarm being shown.

As shown in Figs. 1 and 2, the tower proper and A preferably made of ang 0 iron of V- cross section, a number of braces l3 made of angle-iron of L-shape in cross section, and a number of tie rods C, all arran god and secured together in customary or in any suitable manner to form a triangular tower.

The tower thus constructed is provided with a plurality of cross arms, D, (three be ing shown in the drawing) arranged, alter: nately, on opposite sides of the tower. All of these cross-arms are of like construction,

.so that a description of one will suffice for all.

Each cross-arm is made of two members,

. L shape in cross section. The member all is straight, from end to end, and disposed horn Zontally. It comprises a ortion B which lies against the fiat sides 0 the posts A and A and is secured to them so as to form a brace, and a portion which projects'from (the entire member being straight) lies in the plane of the side A--A oi the tower; Thememberd is straight exce lting that its inner end is bent to conform to one face of the post A, to which it is secured and its outer end is bent to conform to one side of the straight menu the side of the tower and,

her cl, the outer ends of the two members he 'ing secured together.

One advantage in making one member of the cross-arm straight is that the cost of bending it adjacent to the tower post, in

order that it may meet the other member,

saved, but a more important advantage is that it causes the ma or-part of the weight or downward stress to fall substantially in the plane of one side of the tower,-or two of its corner posts, (being the plane of the greatest "vertical resistance) and by arrang mg the cross-arms on opposite sides of the tower, these which tend to tip the tower over, sidewise, are balanced.

An inevitable incident to arranging the projecting portion of one member 0 the cross arm, in the plane of two of the corner osts is that the projecting portions of the two arms are of unequal length and form, with that side of the tower wh' ch their inner ends include, a scalene li'riangle.-

Each of the cross-arms is additionally supported by a tensile brace or rod D one end of which is secured to the member d, near its outer cnd and the other end of which eral'ily where it intercepts the member d at the next higher cross arr so that the pro jccting portion of the member all, the tensile brace and two. of the corner posts lie in substantially the same plane,

Each cross-arrn carries at outer end a stud E, secured. to it through tbeinedium of is secured to the adjacentcornor post, prefend of which has an eye f for the passage of a ring or loop 7 on the top of the suspends insulator, Ll, to the bottom or wh ch the cable, ll, is attached.

are p lol, so that one permits the hanger to swi c longitudinally, relatively to the suspended cable. while the other permits the This stud occupies an'eye' The axes of the eyes insulator to swin transversely, thereby forming a universa' joint between the insulator and cross-arm.

The tower shown in Figs. 5 and 6 has four corner osts, A, A A and A; instead of three, ut the cross-arms are constructed and arranged precisely as above described, so far as the functions of the parts are concerned. In both forms of the invention the cross-arms are arranged, alternately, on opposite sides of the tower and at different elevations and this is an advantageous arrangement of them whenthey are used to carry suspension insulators, because it prevents the cables, when swinging from side to side, from coming as close to each other as they would if suspended at the same elevation-other things being equal; in both, one

member of the cross-arm is straight and its projecting portion lies in the plane of two of the corner posts; in both, one member of the cross arm is secured to two corner posts while the othermember is secured to but one; in both, the cross arm is supported by a tensile brace; in both, the straight members of all of the cross arms are secured to the same two posts; in both the cross arms are arranged alternately on opposite sides of the tower and in both the cross arms carry suspension insulators. r

Preferably each panel of the tower on that side to which the members (1 of the crossarms are secured has a diagonal brace B extending from the intersection of one post with the member (Z of one cross-arm to the intersection of the other post with the member d of the next cross arm, so that in vertieally adjacent panels the diagonal braces incline in o posite directions. This arrangement of t iese diagonal braces is most desirable as it braces and strengthens the structure at what may be called points of the cross arms.

\Vhat I claim new is:

the fulcrum 1. A. transmission tower having a' lurality of corner posts, and a cross-arm mar e oi" two members secured to the corner posts and having portions of unequal lengths projecting outward therefrom.

2. A transmission tower having a luralit y of corner posts, and a cross-arm made of two members secured to the corner posts and having portions of unequal lengths project ing outward therefrom, one of said projecting portions lying in the plane/of two of the corner posts.

5-}. A transmission tower having a plurality of corner posts, and a cross-arm made of two members secured to the posts and having portions r unequal lengths projecting ontward therefrom. one of said members having also a portion Forming a brace extending between two of the corner theretov 4. A. transmission tower having a plurality posts and scoured of corner posts, and a cross-arm made of two members secured to the osts and having ward therefrom, one of said members being straight and having a portion forming a brace extending between two'of the corner posts and secured thereto.

5. A transmission tower having a lurality l of corner posts, and a cross-arm mac e of two members secured to the posts and having portions of unequal lengths projecting outward therefrom, and a tensile brace secured at one end to the cross-arm and at the other end to the tower above the cross-arm. 6. A transmission tower having a lurality of corner posts, and a cross-arm mar e of two members secured to the corner posts andhaving portions of unequal lengths projecting outward therefrom, one of said projecting portions lying in the plane of two of the corner posts, and a tensile brace, one end of which is secured to the cross-ar1n and the other end of which is secured to the tower above the cross-arm.

7. A transmission tower having three corner posts, and a cross-arm made of two members secured to the corner posts and having portions of unequal lengths projecting outward therefrom.

8. A transmission tower havin three .corner posts, and a cross-arm made 0 two-mem bers secured to the corner posts and having portions of unequal lengths projecting outward therefrom, one of said projecting portions lying in the plane of two of the corner posts.

9. A transmission tower havin three cor ner posts, and a cross-arm made ()i two members secured to the posts and having portions of unequal lengths projecting outward therefrom, one of said members having also a portion forming a brace extending between two of the corner posts and secured thereto.

10. A transmission tower having three corner posts and a cross-arm made of two members securedv to the posts and having portions of une ual lengths projecting therefrom, the meidber having the shorter projecting portion being straight, and having a portion forming a brace extending between two of the corner posts and secured thereto.

11. A transmission tower having a lurality of cross-arms arranged, alternate on o )posite sides of the tower and at di erent eievations, in combination with a plurality of suspension insulators and universal joints, suspending them from the cross-arms, respectively, each of said joints comprising a stud on the cross-arm, a hanger having an eye at each end, one of which surrounds said stud loosely so as to be capable of turning freely thereon, and a part loosely occupying the other eye and supporting the insulator.

vity of corner-posts and a cross arm made of portions of unequal lengt 1S projecting out-y 12. A transmission tower having a plural- I two members, one of which is secured to two of said posts and the other of which is se cured to but one of said posts, and terminating at the post to which it is secured, said members having portions projecting outward and secured together.

13.- A transmission tower having a plurality of corner posts, a plurality of cross-arms, each of which has a member secured to two of said posts and forming a brace, and a diagonal brace extending from the intersection of one of said posts one of said members to the intersection of the other of said posts with the other of said members.

14. A transmission tower having a plurality of corner posts, a plurality of cross-arms arranged alternately on opposite sides of the tower, each of said cross-arms having a mem-' ber secured to two of said osts and having a portion projecting from t e tower and a diagonal brace extending from the intersection of one of said posts with one of said. members to the intersection of the otherof said posts with the other of said members.

15. A transmission tower having a plurality of corner posts, a plurality of cross-arms arranged alternately on opposite sides of the tower, each of said cross arms havin a member secured to two of said posts and aving a portion projecting from the tower, a diagonal brace extending from the intersection of one of said posts with one of said members to the intersection of the other of said posts with the other of said members, and a diagonal brace on the opposite side of the post, extending from one post to another, said braces being arranged in directions that cross each 0t 16!. r

DANIEL R. scHoLEs.

- Witnessesiv J. FLANIGAN,

F, L DoLEL. 

